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Hot Swap is when we pump down the system into the condensor and leave some pressure in it so we are venting some of the 410A
They tell us that it is faster this way and we dont have to test with nitrogen or pull it down in a vacuum.

Hot Swap is when we pump down the system into the condensor and leave some pressure in it so we are venting some of the 410A
They tell us that it is faster this way and we dont have to test with nitrogen or pull it down in a vacuum.

I've done things this way and can say from experience that it is t a good method.

I was taught that moisture can enter a system even with pressure on the system because moisture always runs from wet to dry. I think the term was vapor pressure can push moisture into a system through a leak even though the system never loses the total charge. I will admit to quickly changing a txv a time or two the way mentioned without any ill effects that I know of.

???????

Last time I checked 99% of us get paid by the hr. I recommend residential, commercial no matter what application pump it down, change the txv, change the drier and vac the system. This leaves little room for error. That's my personal opinion.

I was taught that moisture can enter a system even with pressure on the system because moisture always runs from wet to dry. I think the term was vapor pressure can push moisture into a system through a leak even though the system never loses the total charge. I will admit to quickly changing a txv a time or two the way mentioned without any ill effects that I know of.

Are you saying moisture can travel from atmospheric pressure to a closed pressurized system through a leak???????? How is this possible???????